4 May 2018 Optical properties of pseudoisocyanine molecular clusters embedded in a nanoporous alumina
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Abstract
The molecular clusters, so called J-aggregates of pseudoisocyanine dye, were obtained in ordered cylindrical nanopores of anodic aluminum oxide. The absorption and luminescence of the samples were studied by the VIS-spectroscopy and laser confocal microscopy. The band of J-aggregates has the same shape, but is inhomogeneous broadened in comparison with solution. The luminescence maximum of J-aggregates was observed at 578 nm upon excitation at 543 nm as well as at 405 nm. Non-resonant luminescence excitation occurred due to energy transfer from oxygen vacancy of alumina to molecular nanoclusters. This is also confirmed by time-resolved luminescence spectroscopy, which shows the increase of luminescence decay time of J-aggregates placed in alumina up to the luminescence time of the clean alumina in comparison with J-aggregates coated on glass substrate.
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Anton A. Starovoytov, Anton A. Starovoytov, Olga I. Lepeshova, Olga I. Lepeshova, Natalia O. Alexeeva, Natalia O. Alexeeva, Vladimir G. Solovyev, Vladimir G. Solovyev, Yuliya A. Razumova, Yuliya A. Razumova, Ivan A. Reznik, Ivan A. Reznik, Mikhail A. Baranov, Mikhail A. Baranov, } "Optical properties of pseudoisocyanine molecular clusters embedded in a nanoporous alumina", Proc. SPIE 10672, Nanophotonics VII, 1067212 (4 May 2018); doi: 10.1117/12.2307395; https://doi.org/10.1117/12.2307395
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